feat(flags): document JS Unleash integration

docs/platforms/javascript/common/configuration/integrations/unleash.mdx

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+---
+title: Unleash
+description: "Learn how to use Sentry with Unleash."
+notSupported:
+  - javascript.aws-lambda
+  - javascript.azure-functions
+  - javascript.bun
+  - javascript.capacitor
+  - javascript.cloudflare
+  - javascript.connect
+  - javascript.cordova
+  - javascript.deno
+  - javascript.electron
+  - javascript.express
+  - javascript.fastify
+  - javascript.gcp-functions
+  - javascript.hapi
+  - javascript.koa
+  - javascript.nestjs
+  - javascript.nodejs
+  - javascript.wasm
+---
+
+<PlatformContent includePath="feature-flags/prerelease-alert" />
+
+<Alert level="info">
+
+This integration only works inside a browser environment. It is only available from a package-based install (e.g. `npm` or `yarn`).
+
+</Alert>
+
+The [Unleash](https://www.getunleash.io/) integration tracks feature flag evaluations produced by the Unleash SDK. These evaluations are held in memory, and in the event an error occurs, sent to Sentry for review and analysis. **At the moment, we only support boolean flag evaluations.** This integration is available in Sentry SDK **versions 8.TODO: or higher.**
+
+_Import names: `Sentry.unleashIntegration`_
+
+<PlatformContent includePath="/configuration/unleash" />
+
+Visit the Sentry website and confirm that your error event has recorded the feature flag "test-flag" and its value "false".
+
+<PlatformContent includePath="feature-flags/next-steps" />

platform-includes/configuration/unleash/javascript.ember.mdx

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+Before using this integration, you need to install and instrument Unleash in your app. Learn more by reading [Unleash's SDK reference](https://docs.getunleash.io/reference/sdks/javascript-browser) and [quickstart](https://docs.getunleash.io/quickstart).
+
+```javascript
+import * as Sentry from "@sentry/ember";
+import { UnleashClient } from "unleash-proxy-client";
+
+Sentry.init({
+  dsn: "___PUBLIC_DSN___",
+  integrations: [Sentry.unleashIntegration(UnleashClient)],
+});
+
+const unleash = new UnleashClient({
+  url: "https://<your-unleash-instance>/api/frontend",
+  clientKey: "<your-client-side-token>",
+  appName: "my-webapp",
+});
+
+unleash.start();
+
+// Evaluate a flag with a default value. You may have to wait for your client to synchronize first.
+unleash.isEnabled("test-flag");
+
+Sentry.captureException(new Error("Something went wrong!"));
+```

platform-includes/configuration/unleash/javascript.gatsby.mdx

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+Before using this integration, you need to install and instrument Unleash in your app. Learn more by reading [Unleash's SDK reference](https://docs.getunleash.io/reference/sdks/javascript-browser) and [quickstart](https://docs.getunleash.io/quickstart).
+
+```javascript
+import * as Sentry from "@sentry/gatsby";
+import { UnleashClient } from "unleash-proxy-client";
+
+Sentry.init({
+  dsn: "___PUBLIC_DSN___",
+  integrations: [Sentry.unleashIntegration(UnleashClient)],
+});
+
+const unleash = new UnleashClient({
+  url: "https://<your-unleash-instance>/api/frontend",
+  clientKey: "<your-client-side-token>",
+  appName: "my-webapp",
+});
+
+unleash.start();
+
+// Evaluate a flag with a default value. You may have to wait for your client to synchronize first.
+unleash.isEnabled("test-flag");
+
+Sentry.captureException(new Error("Something went wrong!"));
+```

platform-includes/configuration/unleash/javascript.mdx

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+Before using this integration, you need to install and instrument Unleash in your app. Learn more by reading [Unleash's SDK reference](https://docs.getunleash.io/reference/sdks/javascript-browser) and [quickstart](https://docs.getunleash.io/quickstart).
+
+```javascript
+import * as Sentry from "@sentry/browser";
+import { UnleashClient } from "unleash-proxy-client";
+
+Sentry.init({
+  dsn: "___PUBLIC_DSN___",
+  integrations: [Sentry.unleashIntegration(UnleashClient)],
+});
+
+const unleash = new UnleashClient({
+  url: "https://<your-unleash-instance>/api/frontend",
+  clientKey: "<your-client-side-token>",
+  appName: "my-webapp",
+});
+
+unleash.start();
+
+// Evaluate a flag with a default value. You may have to wait for your client to synchronize first.
+unleash.isEnabled("test-flag");
+
+Sentry.captureException(new Error("Something went wrong!"));
+```

platform-includes/configuration/unleash/javascript.nextjs.mdx

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+Before using this integration, you need to install and instrument Unleash in your app. Learn more by reading [Unleash's SDK reference](https://docs.getunleash.io/reference/sdks/javascript-browser) and [quickstart](https://docs.getunleash.io/quickstart).
+
+```javascript
+import * as Sentry from "@sentry/nextjs";
+import { UnleashClient } from "unleash-proxy-client";
+
+Sentry.init({
+  dsn: "___PUBLIC_DSN___",
+  integrations: [Sentry.unleashIntegration(UnleashClient)],
+});
+
+const unleash = new UnleashClient({
+  url: "https://<your-unleash-instance>/api/frontend",
+  clientKey: "<your-client-side-token>",
+  appName: "my-webapp",
+});
+
+unleash.start();
+
+// Evaluate a flag with a default value. You may have to wait for your client to synchronize first.
+unleash.isEnabled("test-flag");
+
+Sentry.captureException(new Error("Something went wrong!"));
+```

platform-includes/configuration/unleash/javascript.nuxt.mdx

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+Before using this integration, you need to install and instrument Unleash in your app. Learn more by reading [Unleash's SDK reference](https://docs.getunleash.io/reference/sdks/javascript-browser) and [quickstart](https://docs.getunleash.io/quickstart).
+
+```javascript
+import * as Sentry from "@sentry/nuxt";
+import { UnleashClient } from "unleash-proxy-client";
+
+Sentry.init({
+  dsn: "___PUBLIC_DSN___",
+  integrations: [Sentry.unleashIntegration(UnleashClient)],
+});
+
+const unleash = new UnleashClient({
+  url: "https://<your-unleash-instance>/api/frontend",
+  clientKey: "<your-client-side-token>",
+  appName: "my-webapp",
+});
+
+unleash.start();
+
+// Evaluate a flag with a default value. You may have to wait for your client to synchronize first.
+unleash.isEnabled("test-flag");
+
+Sentry.captureException(new Error("Something went wrong!"));
+```

platform-includes/configuration/unleash/javascript.react.mdx

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+Before using this integration, you need to install and instrument Unleash in your app. Learn more by reading [Unleash's SDK reference](https://docs.getunleash.io/reference/sdks/javascript-browser) and [quickstart](https://docs.getunleash.io/quickstart).
+
+```javascript
+import * as Sentry from "@sentry/react";
+import { UnleashClient } from "unleash-proxy-client";
+
+Sentry.init({
+  dsn: "___PUBLIC_DSN___",
+  integrations: [Sentry.unleashIntegration(UnleashClient)],
+});
+
+const unleash = new UnleashClient({
+  url: "https://<your-unleash-instance>/api/frontend",
+  clientKey: "<your-client-side-token>",
+  appName: "my-webapp",
+});
+
+unleash.start();
+
+// Evaluate a flag with a default value. You may have to wait for your client to synchronize first.
+unleash.isEnabled("test-flag");
+
+Sentry.captureException(new Error("Something went wrong!"));
+```

platform-includes/configuration/unleash/javascript.remix.mdx

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+Before using this integration, you need to install and instrument Unleash in your app. Learn more by reading [Unleash's SDK reference](https://docs.getunleash.io/reference/sdks/javascript-browser) and [quickstart](https://docs.getunleash.io/quickstart).
+
+```javascript
+import * as Sentry from "@sentry/remix";
+import { UnleashClient } from "unleash-proxy-client";
+
+Sentry.init({
+  dsn: "___PUBLIC_DSN___",
+  integrations: [Sentry.unleashIntegration(UnleashClient)],
+});
+
+const unleash = new UnleashClient({
+  url: "https://<your-unleash-instance>/api/frontend",
+  clientKey: "<your-client-side-token>",
+  appName: "my-webapp",
+});
+
+unleash.start();
+
+// Evaluate a flag with a default value. You may have to wait for your client to synchronize first.
+unleash.isEnabled("test-flag");
+
+Sentry.captureException(new Error("Something went wrong!"));
+```

platform-includes/configuration/unleash/javascript.solid.mdx

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+Before using this integration, you need to install and instrument Unleash in your app. Learn more by reading [Unleash's SDK reference](https://docs.getunleash.io/reference/sdks/javascript-browser) and [quickstart](https://docs.getunleash.io/quickstart).
+
+```javascript
+import * as Sentry from "@sentry/solid";
+import { UnleashClient } from "unleash-proxy-client";
+
+Sentry.init({
+  dsn: "___PUBLIC_DSN___",
+  integrations: [Sentry.unleashIntegration(UnleashClient)],
+});
+
+const unleash = new UnleashClient({
+  url: "https://<your-unleash-instance>/api/frontend",
+  clientKey: "<your-client-side-token>",
+  appName: "my-webapp",
+});
+
+unleash.start();
+
+// Evaluate a flag with a default value. You may have to wait for your client to synchronize first.
+unleash.isEnabled("test-flag");
+
+Sentry.captureException(new Error("Something went wrong!"));
+```

platform-includes/configuration/unleash/javascript.solidstart.mdx

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+Before using this integration, you need to install and instrument Unleash in your app. Learn more by reading [Unleash's SDK reference](https://docs.getunleash.io/reference/sdks/javascript-browser) and [quickstart](https://docs.getunleash.io/quickstart).
+
+```javascript
+import * as Sentry from "@sentry/solidstart";
+import { UnleashClient } from "unleash-proxy-client";
+
+Sentry.init({
+  dsn: "___PUBLIC_DSN___",
+  integrations: [Sentry.unleashIntegration(UnleashClient)],
+});
+
+const unleash = new UnleashClient({
+  url: "https://<your-unleash-instance>/api/frontend",
+  clientKey: "<your-client-side-token>",
+  appName: "my-webapp",
+});
+
+unleash.start();
+
+// Evaluate a flag with a default value. You may have to wait for your client to synchronize first.
+unleash.isEnabled("test-flag");
+
+Sentry.captureException(new Error("Something went wrong!"));
+```

platform-includes/configuration/unleash/javascript.svelte.mdx

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+Before using this integration, you need to install and instrument Unleash in your app. Learn more by reading [Unleash's SDK reference](https://docs.getunleash.io/reference/sdks/javascript-browser) and [quickstart](https://docs.getunleash.io/quickstart).
+
+```javascript
+import * as Sentry from "@sentry/svelte";
+import { UnleashClient } from "unleash-proxy-client";
+
+Sentry.init({
+  dsn: "___PUBLIC_DSN___",
+  integrations: [Sentry.unleashIntegration(UnleashClient)],
+});
+
+const unleash = new UnleashClient({
+  url: "https://<your-unleash-instance>/api/frontend",
+  clientKey: "<your-client-side-token>",
+  appName: "my-webapp",
+});
+
+unleash.start();
+
+// Evaluate a flag with a default value. You may have to wait for your client to synchronize first.
+unleash.isEnabled("test-flag");
+
+Sentry.captureException(new Error("Something went wrong!"));
+```

platform-includes/configuration/unleash/javascript.sveltekit.mdx

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+Before using this integration, you need to install and instrument Unleash in your app. Learn more by reading [Unleash's SDK reference](https://docs.getunleash.io/reference/sdks/javascript-browser) and [quickstart](https://docs.getunleash.io/quickstart).
+
+```javascript
+import * as Sentry from "@sentry/sveltekit";
+import { UnleashClient } from "unleash-proxy-client";
+
+Sentry.init({
+  dsn: "___PUBLIC_DSN___",
+  integrations: [Sentry.unleashIntegration(UnleashClient)],
+});
+
+const unleash = new UnleashClient({
+  url: "https://<your-unleash-instance>/api/frontend",
+  clientKey: "<your-client-side-token>",
+  appName: "my-webapp",
+});
+
+unleash.start();
+
+// Evaluate a flag with a default value. You may have to wait for your client to synchronize first.
+unleash.isEnabled("test-flag");
+
+Sentry.captureException(new Error("Something went wrong!"));
+```

platform-includes/configuration/unleash/javascript.vue.mdx

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+Before using this integration, you need to install and instrument Unleash in your app. Learn more by reading [Unleash's SDK reference](https://docs.getunleash.io/reference/sdks/javascript-browser) and [quickstart](https://docs.getunleash.io/quickstart).
+
+```javascript
+import * as Sentry from "@sentry/vue";
+import { UnleashClient } from "unleash-proxy-client";
+
+Sentry.init({
+  dsn: "___PUBLIC_DSN___",
+  integrations: [Sentry.unleashIntegration(UnleashClient)],
+});
+
+const unleash = new UnleashClient({
+  url: "https://<your-unleash-instance>/api/frontend",
+  clientKey: "<your-client-side-token>",
+  appName: "my-webapp",
+});
+
+unleash.start();
+
+// Evaluate a flag with a default value. You may have to wait for your client to synchronize first.
+unleash.isEnabled("test-flag");
+
+Sentry.captureException(new Error("Something went wrong!"));
+```